Improvement in gas-illuminators



UNITED STATES PATENT OFFICE.

MATTHEW ANDREW, OF NEWV YORK, N. Y.

IMPROVEMENT IN GAS-ILLUMINATORS.

Specification forming part of Letters Patent No. 118,669, dated September 5, 1871.

To all whom t may concern:

Be it known that I, MATTHEW ANDREW, ofthe city, county, and State of New York, have invented a new and Improved Gas-Illuminator; and I do hereby declare the following to be a full, clear, and exaet description thereof, which `will enable those skilled in the art to make and use the same, reference heilig' had to the accompan yin g drawing, in which drawing- Figure l represents a front view of this invention. Fig. 2 is a transverse section ofthe saine. Fig. 3 is a horizontal section ofthe same.

Similar letters indicate correspoiuling parts.

This invention relates to a gas-illumin ator composed of a semi-annular plate mounted on a con cave arm, which extends from a pressure-clamp, the concave depression in the arm being of such a depth that by slipping the pressure-clamp over a gas-burner the inner surface ofthe semi-annular plate can be readily adjusted in the plane of the llame, and thereby the illuminating power of the dame is materially improved. The pressureclamp consists of two Vshaped leaves, one of which is stamped out solid with the concave arm and the semiannular plate, while the two leaves are connected at their ends so as to leave a square opening between them and to allow of spreading them apart to accommodate said openin g to the diameter ofthe burner on which the illuminator is to be used, while the leaves are elastic, so as to hug the burner tightly and retain the illuminator firmly in position.

In the drawing, A designates my gas-illuminator, which-consists of a semi-annular disk, a, formed on the top end of an arm, b, which is hollowed out sufficiently to allow of adjusting' the iiat surface over a gas-burner in the plane ofthe flame, as shown in Fig. 2. With the arm is connected a plate, c, which is V-shaped, and which, together with said arm and the semi-annular disk, is stamped out of one and the same piece of sheet metal. With the plate c is connected another plate, d, of similar shape, each of the plates be ing provided with lips e at its ends to catch over the ends ofthe other plates, as shown in Fig. 3, so that a square opening` is left between said plates and that the same can be sprung apart to accommodate the opening between the plates to the diameter of the burner to which the illumiv nator is attached, said plates being elastic, s0 that they will hug the burner elosely, and the illuminator will be firmly retained in the required position. This feature is ofthe greatest importance, since the position ofthe semi-a-nnular disk ay is strictly defined, and unless said disk is brought precisely in the correct position the effect of the illuminator is destroyed. By the combined action of the pressure-clamp and of the concave depression ofthe arm b the illum in ator is enabled to lie close up to the body of the burner, as shown in Fig. 2, and the semi-annular disk, when once adjusted in the correct position, will readily re` tain the same, and the illuminating power ofthe ame is materially improved.

I do not claim, broadly, as my invention a plate to be adjusted on agas-burner for the purpose of increasing the illuminating power of the llame, such plates being shown and described in the patents of Cummings St Douglass, J anna-ry 15, 1856; J. Scholl, December 24, 1867; and C. L. Brown, May 12, 1868; and I distinctly disclaim everything shown and described in these patents.

What I elaim as new, and desire to secure by Letters Patent, is-

A gas-illuminator, eomposed of a semi-annular disk, a., concave arm b, and pressure-clamp c d, all as herein shown and described.

MATTE. ANDREW.

Vitnesses:

W. HAUEF, E. F. KASTENHUBER. 

